Metallic boat construction.



A. P. LUNDI @L E. L. M. SIVARD.

METALLIC BOAT CONSTRUCTION.

APPLICATIor/I FILED MAR. 25, 1911.

1 ,050,480, v Patented Jan. 14, 1913.

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@513% @Wozu @1g A, P. LNDIN L E. L. M. SNARE.

'A METALLIC BAT CONSTRUCTION.

APPLICATION FILED MAR. 25,1911.

ws@ Patented Jem. m, 1913.

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Uf FFIC ANDREAS r. LUNDIN AN-n mNr. L. m. SIVARD, orNEw YORK, N. Y.,ASSIGNonS, :BY

4MESNIL ASSIGNMENTS, To Asroa NEW YORK.

TRUST COMPANY, TRUSTEE, A CORPORATION 0F METALLIC BOA'J.` CONSTRUCTION.

Application led March v25, 1911. Serial No. 616,955.

To all whom t may concern:

Be it known that we, ANDREAS P. LUNDIN and EINAR L. M. SivARD, the, saidLUNDIN a citizen of the United States and the said SIYARD a subject ofthe` King 'of Sweden, both residing in New York, N.. Y., have inventedcertain new and useful Improvements in ,Metallic Boat Construction, ofwhich the following is a specification.

This invention relates to improvements in metallic boat construction.

In metallic boat construct-ion, and particularly in small boats, it is agreat de- Vsideratum to have the greatest strength and piece of pipe,seated-within each groove or seat. Such stiifening members seated insuchv grooves which preferably extend longitudinally the entire lengthof the plating, add greatly to the strength, rigidity and durability ofthe construction without in any Way interfering with' the, inner trim ortransverse framingv of the boat, and enables us to employ plating oflighter weight to ysecure any given degree of strength, rigidity ordurability thanI has heretofore been possible.

Another feature of our invention is the employment of a transverseframing composed of U-shaped metal ribs having integral lateral angessecured directly to the` metal plating. Y

Still another feature of our invention is the novel manner in which thekeel of the boat is formed.

In` the accompanying drawings, in which `similar reference charactersdesignate corresponding pa'rts throughout the several views, Figure l isa cross-sectionof aboat embodying our invention; Fig. 2is a fragmentarysectionalview of `a boat embodying Patented aan. i4, wie.

ribs; 5A is a similar plan view showing our longitudinal stiffeningmembers in combination withl another novel form of trails'- verse' ribs;V Fig. 6 isa section on the line 6-6 of Fig. 4; and Fig. 7 is a sectionon the line 7-7 of Fig. 5.

AReferring now to'these drawings, A designates the .boat as a whole andB designates the outermetallic plating, comprising a plurality or seriesof plates I) l) secured together by rivets o or in any other suitablemanner.- v

The plates b b are provided with longitudinally-extending grooves b3,preferably of semi-circular conformation, formed intheplates'i-ntermediate the vertical edges there-` of so that when suchplates are secured in position, t-he grooves 'will extend the entirelength of the plating or shell at both sides. of the'longitudinal centerline or keel of the` boat. As illustrated, a reinforcing or stiifenin'gmember is ltted snugly within each groove. Such groovesI are sunk belowthe inner surface of the plating, may be readily rolled in the metal ofthe plates before the same are secured in position on the boat and forma seat for the Stifening members hereinabove referred to. The'stiifening members 'may be of any-suitable form' or material, butpreferably comprise a pipe C,

as shown in Figs. 1 ande bent to conform to the curvature of the shellorplating and laid in the'groove so that t-he outer surface or peripherythereof engages or abuts .against the .inner wall of the groove. ln

.Figa 2 and 5 we have shown a stilening member comprising a bar ofmetal, U- shaped in cross-section, and in Fig. 3, we` have illustratedsuch member comprising a wooden 'molding of the form 'shown incross-section in said figure. The stiifening member of whatever formpreferably extends upwardly or outwardlyfrom the bottom of the grooveHush with the inner'surface of the metal plating, so that the same willbe securely retained in position by the transverse framing.

These. grooves,.1n addition to stifl'ening the construction will alsoserve as guards or fenders and'will prevent l the indentation of themet'al plating.

tion is preferably formed, as shown, by depressing an enlarged grooveb4, also preferably semi-circular in cross-section, in the keel platewhich spans the longitudinal een .105 lThe keel of our improved boatconstruc-

